एपीए उद्धरण

Gamma, E. (2011). Design patterns: Elements of reusable object-oriented software. Pearson.

शिकागो स्टाइल उद्धरण

Gamma, Erich. Design Patterns: Elements of Reusable Object-oriented Software. New Delhi: Pearson, 2011.

एमएलए उद्धरण

Gamma, Erich. Design Patterns: Elements of Reusable Object-oriented Software. Pearson, 2011.